Parent magma which originated from partial melting of the upper mantle generated sulfide melting segregation and sulfurization to form early rich nickel ore bodies and some poor ore during rifting through the upper mantle lithosphere to emplace. 源自上地幔局部熔融的母岩浆,在通过上地幔岩石圈上升侵位过程中,就地发生硫化物熔离作用和硫化作用,形成早期的富镍矿体和部分贫矿石;
The operational capability analysis of self-propelled artillery based on the SPA-AHP method is educed from the relatively decision-making matrixes constructed by the cost indexes, such as firepower response time, overall combat weight, time to emplace, hull exposed area, and the related benefit indexes. 基于集对-层次分析法的自行火炮作战能力分析,根据火力反应时间、战斗全重、行军战斗转换时间、车体暴露面积等成本型指标及相关效益性指标做出相应决策矩阵。